Bettsh



N. C. SORENSEN BRUSH Flled Aug. 22, 1923 TJ 1 1 Q E l w 111 1 1 1 1 ,1 11 111111 NN v Dec. 22, 41925. l1,56is,51`1

N. C. SORENSEN BRUSH Filed Aug. 22, 1925 2 Sheets-Shut 2 www, 1

y 15k/Moray Patented Dec. 22, 1925.

NIELs yCHRISTIAN sonnnsnn, or CHIQAGQYILLINOIS.

BRUSH.

Appiicanon niet August 22, i923. seriai No. 658,677.

To all whom it may concern.'

ABe it known that I, NrELsCi-IRISTIAN So-r nnNsnN, a citizen ofthe'United States, and a resident of the city of Chicago, county of iCook and State of Illinois, have invented` certain new and usefulImprovements in Brushes, of which the following is a specification.

invention relates to brushes, and more particularly to steelnwirebrushes, particularly adapted for mechanics for use in machine shops,welding shops, etc., for cleaning parts to be welded, soldered, or thelike, and which is especially adapted for use with articles which arehot.

One of the objects of the invention is to construct the brush entirelyof metal, so that it will not be damaged by heat. Another object is toarrange the parts so that the brush can be quickly and cheaplyconstructed with a simple die operation; and a further object is toprovide such a brush which is very durable in use and in which thebristles are firmly and positively held in position.

Other objects will appear hereinafter. rillhe invention consists in thecombinations and arrangements of parts hereinafter described aiidclaimed.

The invention will be best understood by,

reference to the accompanying drawin s forming a part of thisspecification, and in which*- Fig. 1 is an elevational view of my brush;

Fig. 2 is an inverted plan view of the head portion of the brush;

Fig. 3 is a longitudinal sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is an enlarged cross sectional view taken on line H of Fig. 1;

Fig. 5 is a detail of the blank or pattern from which the brush head isformed, and

Figs. 6 and 7 are respectively, a sectional and an inverted plan viewshowing the various parts placed ready in position for the dies to forcesaid parts together into finished shape.

The form of my invention illustrated in the drawings comprises -a brushprovided with a rounded handle 10 and a troughshaped head 11 integraltherewith, and constructed from a blank or pattern of sheet metal. Teeth12 are formed at the side edges of the head providing indentations 13therebetween, said teeth having rounded tips, as best shown in Fig. 5,to facilitate making the die used for cutting the pattern.

An integral tongue 14 extends from the outer end of saidhead.

In the finished brush, bristles l5, which are preferably made ofsteel-wire, are clamped between the-inner sideof head 11 and a curvedbar 16 which extends the length of said head and is lirmlyretainedinpositionk therein by the inwardly bent teeth 12 assisted by the inwardlybent tongue 14, said curved bar, teeth and tongue being so firmly forceddownward that the intermediatepor'- tions of the bristles areconsiderablyv compressed together and rmly held inl position thereby. f

In making thebrush the pattern or blank is cut out making the'liandleand head in,- tegral and providing equally spaced teeth 12 at the sideedges and a tongue 14 at the free end of head 11. This patternv orblank,

including the teeth and the tongue as well as the other parts, is thenbent upwards substantially in trough formation, as indicated in Figs..6and .7; and the bristles are then placed across tbe head. 11l beingequally spaced by teeth 12, and the bar 16 is laid over the bristles, asshown in said Figs. 6 and 7. r[he device is thereafter subjected toasingle die press operation whereby the bar 16 is bent downwardly withthe intermediate portionsV of the bristles 15v compressing said bristlesfirmly together and clamping them between said bar and the inner sideofhead 11, and during said die press operation the ytongue 14 and theteeth 12 have been forced inwardly and firmly clamped over the edges ofbar 16, providing the finished brush in the manner shown in Figs. l to4, inclusive, with the handle rounded and the bristles eX-` tendingupwardly and being substantially evenly distributed at their outer ends.

It is apparent from thepabove that this brush can be easily and cheaplyconstructed, and being entirely of metal provides a particularly usefuland desirable brush for mechanics in machine shops and for cleaningheated parts of machines or any article.

While I have illustrated and described the preferred form ofconstruction for carryingV my invention into effect, this is capable ofvariation and modification without depart' ing from the spiritl of theinvention. I, therefore, do not wish to be limited to the precisedetails of construction set forth, but f desire to avail myself of suchvariations and modifications as come within the scope of the appendedclaims.

Having described Vmy invention, what I claim as new and desire to secureby Letters Patent is:

l. A brush having a metalhead with an integral handle at one end andwith projections at the side edges, metal bristles mounted between saidprojections, a member mounted over said bristlesy to hold them firmly inposition, said projections being bent inward over said member, andinea-ns at the outer end ofv said head clamped over said member toassist said projections to hold said member and bristles firmly inposition.

being trough-shaped in cross section, steelwire bristles mounted in saidhead, a Curved bar mounted over said bristles to hold them firmly inposition, teeth on the side edges of said head to space said bristlesand to clamp said bar thereover, and a tongue at the end ofsaid headbent inwardly over said bar.

ln testimony whereof have signed my name to this specification.

NELS CHRISTIAN SORENSEN

